How to enhance syntax highlighting ?

[Coderx7]

the current syntax highlighter doesn't seem to do much of a work. below is a Matlab snippet As you can see, syntax highlighting is almost non-existent! is this normal? Is there a way to remedy this? I tried using the common pack from here , downloaded the highlight.js file, uploaded it to the pagedown directory, replaced it with the existing one, also uploaded the styles folder which was downloaded alongside the js file. yet nothing changed! I would be grateful if you could shed some light on this and how should someone go about it in order to have a working/decent synatx highlighting capability.